Win32/Cryptor + Generic13 + many others

Hello.
SAS/MBAM/AVG is a good combination. If you install a 3rd party firewall, the firewall installed will turn windows firewall off automatically for you.

By experience, I've only installed SP3 on a real OS that is validated. I can't tell if yours is validated though. I think it should be, I see IE7 on this machine.

Belahzur, thank you so much. Like I said, I can't tell you how grateful I am, even if only for the peace of mind. I'm using the Outpost firewall and 3 new Firefox add-ons I've noticed you recommended in another topic (Ad-Block Plus, NoScript, and FlashBlock). The new firewall and NoScript are a bit confusing, especially for my mother who shares the same PC (as you may have noticed), but it's nothing we can't figure out and I already feel much more protected. Also, my OS is real, it came pre-installed when I got this PC from Dell about 6-7 years ago. I suppose I'll give SP3 a try.

The computer seems pretty stable now, so we'll see if anything else decides to pop up. Again, thank you so much for your time and expertise. After going crazy over these infections, you've managed to restore a bit of my faith in humanity!

No problem.
Just a quick note:

When I installed SP3 on my XP laptop, it took 40mins, so yours may take anywhere upto 30mins or more, so do not worry if it seems it's taking ages.